Robustness-based design of water distribution systems

Donghwi Jung, Doosun Kang, Joong Hoon Kim, Kevin Lansey

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Robustness is generally defined as an ability of a system to maintain its function under a defined set of disturbances. To introduce robustness to the water distribution systems (WDSs) design, chance constrained, or so-called reliability-based models have been formulated. Under variations in system parameters, such as nodal demands and pipe roughness, system reliability is generally measured as the probability that the stochastic nodal pressures will be higher than an allowable minimum pressure limit. However, chance constraints may not be the best formulation to improve system robustness because it focuses on the likelihood of failure under a specified set of conditions rather than developing a solution that consistently provides adequate service. In addition, the reliability-based design requires defining the demand condition, its probability distribution and its statistics, which are not straight forward in practice. To address these difficulties, a robustness index that limits the range of the system function variability is posed here and incorporated in a two objective optimization problem. Resulting designs are compared with those from the reliability constraint formulation. The authors demonstrate that the robustness-based design improves resilience relative to the reliability-based design. DOI: 10.1061/(ASCE)WR.1943-5452.0000421.

Original languageEnglish
Article number04014033
JournalJournal of Water Resources Planning and Management
Volume140
Issue number11
DOIs
Publication statusPublished - 2014 Nov 1

Keywords

  • Reliability
  • Resilience
  • Robustness
  • System hydraulic availability (SHA)
  • WDS design

ASJC Scopus subject areas

  • Water Science and Technology
  • Civil and Structural Engineering
  • Management, Monitoring, Policy and Law
  • Geography, Planning and Development

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